Improvement in feed-water heaters



W. H. D. SWEET. Feed-Water Heaters.

No. 212,117. Patented Feb. 11,1879L W'xesses. XW( Heim.

N PETERS, PHOTO MER. wASHxNGToN. D. C.

NITED STATES PATENT OFFICE.

W'ILLIAM H. D. SWEET, OF ALBANY, NEW YORK.

IMPROVEMENT IN FEED-WATER HEATERS.

Specication forming part of Letters Patent No. 212,117, dated FebruaryI1, 1879; application filed February 10, 1877.

To all whom 'it may concern:

Beit known that I,W1LLIAM H D. SWEET, of the city and county of Albany,and State of New York, have invented certain new and useful Improvementson Feed-Water Heaters, of which the following is a full and exactdescription, reference being had to the accompanyin g drawings, making apart of this speciication, in which- Figure l is a longitudinal section;Fig. 2, a front elevation of a modification of my invention for use inthe smoke-box of locomotiveboilers 5 and Fig. 3, an enlargedlanddetached sectional view, showing the manner of securing the tubes.

My invention relates to feed-water heaters in which Siphon-shaped tubesare used 5 and it consists in constructing such heaters with abase-piece consisting of a single casting, in which are included atube-plate and two independent water-chambers, and to which the benttubes are secured by means of compound nuts, in the manner herein setforth.

As shown in the drawings, Arepresents the base-piece, which is castcomplete iu one piece, the top plate of which forms an integral partthereof, and constitutes the tube-plate, to which the ends of the benttubes are secured, in the manner hereinafter set forth. A partition, a,cast in the base-piece, divides it into two separate and distinctcompartments or chambersone for receivin g the water from the feed-pump,and the ot-her for delivering it through the feed-pipes to the boiler;B, the tubes, which are bent into a siphon form, having a longscrew-thread cut upon eachv end of `them; O, compound nuts provided withduplex screwthrcads-one in the interior portion of them, for screwingupon the ends ot' the tubes, and another around their exterior, forscrewing into the holes formed in the tube-plate of the base-piece forreceiving them.

By means of these compound nuts the bent tubes are secured to thebase-piece in the following manner: The nuts are first screwed upon theends of each tube, the long threads ot' which allow them to be run up onthe tube a distance more than equal to twice the thickness of thetube-plate. The two ends of each tube are inserted, as shown in Fig. 3,into the holes for receiving them, tapped in the tubeplate of thebase-piece, and arranged in such manner that the opposite end of eachtube .will communicate with different chambers in the base-piece.

with openings d, for the induction and educ tion of exhaust-steam of theengineby the usual exhaust-pipe.

The operation of my heater is simply as follows: The feed-water isforced into one of the chambers of the base-piece and passes through thetubes into the other chamber, and from thence into the boiler. The tubesbeing constantly surrounded by the exhaust-steam, the water passingthrough them becomes thoroughly heated thereby.

' In the modification shown in Fig. 2, I use two chambers, E, made inseparate castings, and connect them by the bent tubes B, secured theretoin the manner hereinbetbre described. When made in this form the heateris intended for use without any exterior casing, to utilize the wasteheat escaping into the smoke-box of locomotive-boilers.

I am aware that heaters and condensers have heretofore been constructedwith bent tubes secured to tube-plates made independpound nuts C, incombination with the casing D, as herein specified.

WILLIAM H. D. SWEET.

Witnesses HARRY EDWARDS, WILLIAM H. Low.

